4. When does positive feedback regulation process is involved during menstrual cycle?
a. if high levels of a hormone stimulate the output of even more hormone
b. if the original stimulus is negated
c. if it can be out of control
d. if it requires continuous adjustment

5. when does positive feedback mechanism regulates the secretion of luteinizing hormones?
a.when the follicle is uncaptured
b.when the egg cell complete the second meiotic division
c.when the ovary rupture and ovulation occurs.
d.all of the above​